SY88913VKG [MICREL]
5V/3.3V 1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER; 5V / 3.3V 1.25Gbps的高速限幅后置放大器
| 型号： | SY88913VKG |
| 厂家： | 
MICREL SEMICONDUCTOR |
| 描述： | 5V/3.3V 1.25Gbps HIGH-SPEED LIMITING POST AMPLIFIER |
| 文件： | 总7页 (文件大小：51K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SY88913V
5V/3.3V 1.25Gbps HIGH-SPEED
LIMITING POST AMPLIFIER
FEATURES
DESCRIPTION
■ 3.3V and 5V power supply options
■ Up to 1.5Gbps operation
■ Low power
The SY88913V limiting post amplifier with its high gain
and wide bandwidth is ideal for use as a post amplifier in
fiber-optic receivers with data rates up to 1.5Gbps.
Signals as small as 5mVp-p can be amplified to drive
devices with PECL inputs. The SY88913V generates a
chatter-free PECL Loss of Signal (/LOS) output.
The SY88913V incorporates a programmble level
detect function to identify when the input signal has been
lost. This information can be fed back to the /EN input of
the device to maintain stability under loss of signal
■ Low noise
■ Chatter-Free /LOS Generation
■ PECL /LOS Output
■ TTL /EN Input
■ Differential PECL inputs for data
■ /EN input is TTL with internal 27K pull up
■ Single power supply
conditions. Using LOS
pin the sensitivity of the level
LVL
detect can be adjusted. The LOS
voltage can be set
LVL
by connecting a resistor divider between V
and V
,
CC
REF
■ Designed for use with Micrel-Synergy laser diode
Figure 2. Figure 3 and 4 show the relationship between
driver and controller
input level sensitivity and the voltage set on LOS
.
LVL
■ Available in a tiny 10-pin (3mm) MSOP
APPLICATIONS
■ 1.25Gbps Gigabit Ethernet
■ 531Mbps and 1062Mbps Fibre Channel
■ 622Mbps SONET
■ Gigabit Interface Converter
BLOCK DIAGRAM
DIN
DOUT
ECL
Buffer
Limiting
Amplifer
/DIN
/DOUT
VREF
VCC
Enable
/EN
Level
Detect
GND
LOS
LOSLVL
Rev.: C
Amendment:/0
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
1
Issue Date: August 2005
Micrel, Inc.
SY88913V
PACKAGE/ORDERING INFORMATION
Ordering Information
/EN
DIN
1
2
3
4
5
10 VCC
Package
Operating
Range
Package
Marking
Lead
Finish
Part Number
Type
K10-1
K10-1
K10-1
9
8
7
6
DOUT
SY88913VKC
SY88913VKCTR(1)
SY88913VKG
Commercial
Commercial
Industrial
913V
913V
Sn-Pb
Sn-Pb
MSOP
K10-1
/DIN
/DOUT
/LOS
VREF
LOSLVL
913V with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
GND
SY88913VKGTR(1)
K10-1
Industrial
913V with
Pb-Free bar-line indicator
Pb-Free
NiPdAu
16-Pin MSOP (K10-1)
Note:
1. Tape and Reel.
PIN NAMES
GENERAL DESCRIPTION
General
Pin
DIN
Type
Data Input
Data Input
Input
Function
The SY88913V is an integrated limiting amplifier intended
for high-frequency fiber-optic applications. The circuit
connects to typical transimpedance amplifiers found within
a fiber-optics link. The linear signal output from a
transimpedance amplifier can contain significant amounts
of noise, and may vary in amplitude over time. The
SY88913V limiting amplifier quantizes the signal and outputs
a voltage-limited waveform.
Data Input
/DIN
Inverting Data Input
Loss of Signal Level Set
Output Enable (active Low)
LOSLVL
/EN
TTL Input
PECL Output
/LOS
Loss of Signal Indicator
(active Low)
GND
DOUT
/DOUT
VCC
Ground
Ground
The TTL /EN pin allows the user to disable the signal
without removing the input signal.
PECL Output
PECL Output
Power Supply
Output
Data Output
Inverting Data Output
Positive Power Supply
VREF
Reference Voltage Output
for LOS Level Set (see Fig. 2)
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
2
Micrel, Inc.
SY88913V
(1)
ABSOLUTE MAXIMUM RATINGS
Symbol
Rating
Power Supply Voltage
Input Voltage
Value
0 to +7.0
Unit
V
VCC
DIN, /DIN
0 to VCC
V
DOUT, /DOUT, /LOS
Output Voltage (with 50Ω load)
Input Voltage
VCC –2.5 to VCC +0.3
0 to VCC
V
LOSLVL
VREF
TA
V
Output Voltage
VCC –2.0 to VCC
–40 to +85
V
Operating Temperature Range
Storage Temperature Range
°C
°C
Tstore
–55 to +125
Note:
1. Permanent device damage may occur if absolute maximum ratings are exceeded. This is a stress rating only and functional operation is not implied at
conditions other than those detailed in the operational sections of this data sheet. Exposure to absolute maximum ratlng conditions for extended periods
may affect device reliability.
DC ELECTRICAL CHARACTERISTICS
V
= +3.3V ±10% or +5V ±10%, R
= 50Ω to V –2V
CC
LOAD CC
TA = –40°C
Min. Max.
TA = 0°C
TA = +25°C
TA = +85°C
Min. Max.
Symbol
Parameter
Power Supply
Current(1)
Min.
Max.
Min.
Typ.
Max.
Unit
ICC
5V
3.3V
—
—
35
35
—
—
35
35
—
—
21
23
35
35
—
—
40
40
mA
IIL
/EN Input LOW Current
/EN Input HIGH Current
–0.3(5)
—
–0.3(5)
—
–0.3(5)
—
—
–0.3(5)
—
mA
IIH
—
—
20(2)
100(3)
—
—
20(2)
100(3)
—
—
—
—
20(2)
100(3)
—
—
20(2)
100(3)
µA
VCMR
Voffset
Common Mode Range
Differential Output Offset
GND +2.0 V –1.0 GND +2.0 V –1.0 GND +2.0
—
±40
—
V
–1.0 GND +2.0
V
–1.0
V
mV
V
CC
CC
CC
CC
—
±100
—
±100
—
±100
—
±100
LOSLVL LOSLVL Level
VREF
VCC
VREF
VCC
VREF
VCC
VREF
VCC
VOH
DOUT and /DOUT
HIGH Output
VCC –1085 VCC –880 VCC –1025 VCC –880 VCC –1025 VCC –955 VCC –880 VCC –1025 VCC –880
mV
VOL
DOUT and /DOUT
LOW Output
VCC –1830 VCC –1555 VCC –1810 VCC –1620 VCC –1810 VCC –1705 VCC –1620 VCC –1810 VCC –1620 mV
VREF
VIH
Reference Supply(4)
VCC –1.38 VCC –1.26 VCC –1.38 VCC –1.26 VCC –1.38 VCC –1.32 VCC –1.26 VCC –1.38 VCC –1.26
V
V
V
/EN Input HIGH Voltage
/EN Input LOW Voltage
2.0
—
—
2.0
—
—
2.0
—
—
—
—
2.0
—
—
VIL
0.8
0.8
0.8
0.8
Notes:
1. No Output Load.
2. VIN = 2.7V.
3. VIN = VCC
.
4. IREF must be limited to be within –0.8mA (source) and 0.5mA (sink).
5. VIN = 0.5V.
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
3
Micrel, Inc.
SY88913V
AC ELECTRICAL CHARACTERISTICS
V
= +3.3V ±10% or +5V ±10%, R
= 50Ω to V –2V.
LOAD CC
CC
TA = –40°C
TA = 0°C
TA = +25°C
TA = +85°C
Symbol
Parameter
Min. Max. Min. Max. Min. Typ. Max. Min. Max. Unit
Conditions
PSRR
Power Supply(1)
Rejection Ratio
—
5
—
—
5
—
—
5
35
—
—
—
5
—
dB
Input referred,
55MHz
VID
Input Voltage Range
1800
1800
1800
1800 mVPP
VOD
Differential Output
Voltage Swing(2)
—
200
—
—
—
200
—
—
—
200
700
250
—
—
—
200
—
—
mV
mV
VID = 15mVPP
VID = 5mVPP
tOFFL
/LOS Release Time(3)
Minimum Input
—
0.5
—
0.5
—
0.1
0.5
—
0.5
µs
tONL
/LOS Assert Time(3)
—
—
0.5
0.5
—
—
0.5
0.5
—
—
0.2
0.1
0.5
0.5
—
—
0.5
0.5
µs
µs
tOFFH
/LOS Release Time(4)
Maximum Input
VSR
HYS
tr, tf
/LOS Sensitivity Range
/LOS Hysteresis
5
2
50
8
5
2
50
8
5
2
—
50
8
5
2
50 mVPP
4.6
8
dB
ps
Output Rise/Fall Time
—
—
260
—
—
—
260
—
—
—
170
trin,tfin
260
—
—
—
260
—
VID > 100mVPP
VID < 100mVPP
Notes:
1. Input referred noise = RMS output noise/low frequency gain.
2. Input is 622MHz square wave.
3. Input is a 200MHz square wave, tr < 300ps, 8mVPP
4. Input is a 200MHz square wave, tr < 300ps, 1.8VPP
.
.
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
4
Micrel, Inc.
SY88913V
APPLICATION NOTE
Output Termination
The SY88913V ground pin should be connected to the
circuit board ground. Use multiple PCB vias close to the
part to connect to ground. Avoid long, inductive runs which
can degrade performance.
The SY88913V outputs must be terminated with a 50Ω
load to V –2V (or Thevenin equivalent).
CC
Layout and PCB Design
Since the SY88913V is a high-frequency component,
performance can largely be determined by board layout
and design. A common problem with high-gain amplifiers is
feedback from the large swing outputs to the input via the
power supply.
VCC
0.1µF
DIN+
R1
0.1µF
DIN–
LOSLVL
50Ω
50Ω
R2
VREF
VREF
0.1µF
Figure 1. Differential Input Configuration
Figure 2. LOSLVL Circuit
Notes:
R2 × 1.32
LOSLVL = VCC –1.32 +
R1 + R2
R1 + R2 ≥ 5kΩ
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
5
Micrel, Inc.
SY88913V
PERFORMANCE CURVE
LOS Assert and Deassert
LOS Assert and Deassert
Levels vs LOS
Levels vs LOS
LVL
LVL
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
0
5.0V
3.3V
T
A = 25°C
TA = 25°C
1.25Gbps
1.25Gbps
Pattern 27-1
Pattern 27-1
0
-0.2 -0.4 -0.6 -0.8 -1.0 -1.2
0
-0.2 -0.4 -0.6 -0.8 -1.0 -1.2
LOS
= V – V (V)
CC
LOS
= V – V (V)
CC
LVL
LVL
Figure 4. 5.0V LOS Assert and
Deassert Levels vs. LOSLVL
Figure 3. 3.3V LOS Assert and
Deassert Levels vs. LOSLVL
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
6
Micrel, Inc.
SY88913V
10 LEAD MSOP (K10-1)
Rev. 00
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL + 1 (408) 944-0800 FAX + 1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its use.
Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product can
reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant into
the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A Purchaser’s
use or sale of Micrel Products for use in life support appliances, devices or systems is at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2005 Micrel, Incorporated.
M9999-081505
hbwhelp@micrel.com or (408) 955-1690
7
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